*::after, *::before {
  box-sizing: border-box;
}

*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
} 


section {
  position: relative;
  height: 100vh;
  background-color: var(--clr);
}

header {
  position: relative;
  width: 100%;
}

section .box {
  position: relative;
  min-height: 90vh;
  background: var(--clr);
}

header {
  position: sticky;
  top: 0;
  z-index: 100000;
  background: var(--clr);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 50px;
  color: #FFF;
}

header .logo {
  text-decoration: none;
  color: #FFF;
  font-weight: 700;
  font-size: 1.5em;
  padding: 10px;
}

header nav a {
  text-decoration: none;
  color: #fff;
  padding: 15px 10px;
}